On the most recent episode of the MBC entertainment program 'Infinite Challenge,' which aired on December 20, 2014, the Infinite Challenge members listed the final list of performers on their 'Saturday Saturday Is a Signer' performance. They had been preparing for the stage performance with a lineup of popular singers from the 1990s. On this day's episode, the Infinite Challenge members recruited popular singers from the 1990s, and confirmed guests such as singers Kim Hyun Jung, So Chan Hwi, Lee Jung Hyun, Kim Gun Mo, Jo Sung Mo, S. E. S., and Um Jung Hwa. In related news, on the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' the members recruited popular singers from the 1990s and hosted a stage performance, showing popular songs from the 1990s. The popular MBC entertainment program 'Infinite Challenge' is one of the popular, long lasting entertainment programs in Korea. It features the Infinite Challenge members Ha Ha, Park Myung Soo, Yoo Jae Suk, Jung Joon Ha, and Jung Hyung Don.